For an explicit example, the case of the \(\ell =2\)  d-wave superconductor will be considered. The problem was in fact solved for this case in Ref. [1]} to set up the BHRY superconductor. The model aims to describe a massive spin-2 field in \(d+1\)  spacetime dimensions with a total of \((d+2)(d-1)/2\)  physical degrees of freedom. However, the field being represented by a symmetric tensor \(B_{\mu \nu }\)  with \((d+1)(d+2)/2\)  free elements, the theory contains \(d+2\)  degrees of freedom that are spurious. Accordingly, \(2(d+2)\)  extra constraint equations are required, so as to fix both the values of those fields and their momenta.
